What timing retard options are out now?
07-22-2011, 09:09 AM
#21
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I would pull 6*. Now you will not need that much timing retard, but since your trying to learn if you pull extra timing out, you can make some timing adjustments and see how the plug changes to help get you some familiarity with the process while your still on the forgiving jets.
07-22-2011, 03:13 PM
#22
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Sounds good, will start at 100 and move up from there. You think jetting for 175 will be afe on pump gas? Will be pulling fuel off the rail, I've already got the 255lph pump, what else do i need fuel wise.
07-22-2011, 03:33 PM
#23
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175hp can be done on pump, as always if tuned properly. Take your time and get with me if you have questions and you will be fine.
07-28-2011, 11:25 PM
#29
LS1Tech Sponsor
LNC-2000 timing retard and 2-step status update Status update on the Lingenfelter Performance Engineering LNC-2000 2-step with timing retard.
We were expecting to be assembling modules and shipping by the end of this week but during some final evaluation testing we noticed that the new noise filtering hardware and software was resulting in a signal delay significant enough that it was causing measurable timing retard even when no timing retard was requested. We ran the circuit simulations and they validated what we were seeing with the measurement equipment.
We have changed the hardware and software (same circuit boards - just different parts on the board) and have run the simulations and tested prototypes and the signal delay problem has been resolved. We have retested prototypes in vehicle but need to do some final dynamometer testing. We are hoping to be assembling modules next week (week of the 1st) so that we can ship the week of the 8th.
Good news - during the software development we have developed a newer RPM limit algorithm that provides smoother/faster 2-step operation.
We were expecting to be assembling modules and shipping by the end of this week but during some final evaluation testing we noticed that the new noise filtering hardware and software was resulting in a signal delay significant enough that it was causing measurable timing retard even when no timing retard was requested. We ran the circuit simulations and they validated what we were seeing with the measurement equipment.
We have changed the hardware and software (same circuit boards - just different parts on the board) and have run the simulations and tested prototypes and the signal delay problem has been resolved. We have retested prototypes in vehicle but need to do some final dynamometer testing. We are hoping to be assembling modules next week (week of the 1st) so that we can ship the week of the 8th.
Good news - during the software development we have developed a newer RPM limit algorithm that provides smoother/faster 2-step operation.
07-30-2011, 02:06 PM
#33
LS1Tech Sponsor
Lingenfelter LNC-2000 2-step with timing retard status update We finished testing today on the chassis dynamometer with the LNC-2000. The LNC-2000 is the replacement for the LNC-002. Based on the results of this testing and the testing completed before, the LNC-2000 is now released for production.
The LNC-2000’s will start getting assembled next week (week of the 1st of August) and will be shipping the week of the 8th. We expect to assemble 25 units for this first batch. I think we already have standing orders for about half of the units so place your orders with us or with your LPE distributor right away if you want one from this first batch. We expect to produce another batch of 25 to 30 parts in another week or two.
Like the LNC-002 it replaces, the LNC-2000 provides one 2-step setting and then also provides the ability to retard timing based on a switch setting or based on boost pressure. When setting the timing retard based on the switch setting you can also ramp in the retard versus time.
The LNC-2000 has these added features/changes compared to the LNC-002:
[Sorry if this is a repeat post for some people - I have cross posted this in a couple of places where it seemed directly related to the discussion.]
The LNC-2000’s will start getting assembled next week (week of the 1st of August) and will be shipping the week of the 8th. We expect to assemble 25 units for this first batch. I think we already have standing orders for about half of the units so place your orders with us or with your LPE distributor right away if you want one from this first batch. We expect to produce another batch of 25 to 30 parts in another week or two.
Like the LNC-002 it replaces, the LNC-2000 provides one 2-step setting and then also provides the ability to retard timing based on a switch setting or based on boost pressure. When setting the timing retard based on the switch setting you can also ramp in the retard versus time.
The LNC-2000 has these added features/changes compared to the LNC-002:
- increased noise filtering to further isolate it from unwanted electrical noise signals
- analog input to allow an external device to vary ignition timing retard (so external nitrous controllers, switch boxes etc can now modify the timing retard while the engine is running)
- improved 2-step software algorithm for holding the RPM set point
[Sorry if this is a repeat post for some people - I have cross posted this in a couple of places where it seemed directly related to the discussion.]
07-30-2011, 02:12 PM
#34
LS1Tech Sponsor
Chassis dyno testing graphs from LNC-2000 testing Here is a chassis dynamometer graph of our testing of the LNC-2000 on a 427 Pontiac Firebird Trans Am. One power curve is with 4 degrees of timing retard and the other is with 8 degrees of timing retard. Both runs on the first graph are engine only (no nitrous).
Attached is another graph of the same 427 CID Firebird TA with and without the nitrous on. It goes real rich at low RPM but normally you wouldn't be in that range with the nitrous on. This testing was for LNC-2000 function testing so we weren't trying to optimize the engine performance and nitrous system.
The nitrous system is a Nitrous Outlet wet nitrous system with no controller (simple on/off control). Jets are 52 N2O and 28 Fuel.
The fuel is provided by the main fuel pump (Racetronix TI-Walbro GSS high flow fuel pump kit). A Boost-A-Pump (fuel pump voltage booster) is enabled when the nitrous is enabled in order to maintain fuel pressure.
Attached is another graph of the same 427 CID Firebird TA with and without the nitrous on. It goes real rich at low RPM but normally you wouldn't be in that range with the nitrous on. This testing was for LNC-2000 function testing so we weren't trying to optimize the engine performance and nitrous system.
The nitrous system is a Nitrous Outlet wet nitrous system with no controller (simple on/off control). Jets are 52 N2O and 28 Fuel.
The fuel is provided by the main fuel pump (Racetronix TI-Walbro GSS high flow fuel pump kit). A Boost-A-Pump (fuel pump voltage booster) is enabled when the nitrous is enabled in order to maintain fuel pressure.
08-05-2011, 10:46 AM
#36
LS1Tech Sponsor
LNC-2000 timing retard Timing retard is in 1 degree increments. 15 degrees is maximum retard.
If you want to get one ordered I would recommend contacting someone in our sales department (by phone or email). I think 19 of the first 25 are sold.
If you want to get one ordered I would recommend contacting someone in our sales department (by phone or email). I think 19 of the first 25 are sold.
08-07-2011, 10:45 PM
#38
LS1Tech Sponsor
